I have rank in 2 arts '3rd dan' Karate and Traditional Japanese Jujitsu, but I have dabbled and trained with people in other arts and picked up the basics well and added it to my Martial arts, these arts include.. Wing Chun, Hapkido, Most forms of grappling in some way..BJJ, shoot wrestling, judo 'trained with a judo bb for about 2 years' kook sool won, tang so do.. I dont claim to know those arts inside out.lol of course not I just trained for a long period of time with people from those arts so it influenced me in some way.